InterlockedDecrement32

Atomically decrements a 32-bit value by one and returns the new value.

Syntax: InterlockedDecrement32( Target ) As Long

Target

required Long. The 32-bit variable to decrement, passed by reference.

The read, subtract, and write happen as one atomic operation. The return value is the post-decrement value of Target — testing against zero is the canonical way to spot the last release of a refcounted resource. Wraps the Win32 InterlockedDecrement intrinsic. No overflow error is raised: decrementing -2,147,483,648 gives 2,147,483,647.

See Also

• InterlockedIncrement32 function
• InterlockedCompareExchange32 function